COPACCopac provides free online access to the merged bibliographic catalogues of some of the largest university research libraries in the UK and Ireland, plus the British Library. http://www.copac.ac.uk/

The History DatabaseThe History Database at the Institute of Historical Research, LondonThe History Database

The Working Class Movement LibraryAn extensive and unique collection on the history of British and Irish radical movements from the late eighteenth century to the present day. The site includes an on-line catalogue.http://www.wcml.org.uk

GenesisGenesis is a project to develop access to women's history sources in the UK, based at The Women's Library in London. The site has a searchable database of library, museum and archive collections.http://www.genesis.ac.uk

The Women's History Network, UKThe Women's History Network is a national association for all those concerned with promoting women's history and encouraging women interested in history.http://www.womenshistorynetwork.org/